from Crypto.PublicKey import RSA
from Crypto.Hash import SHA256
import base64


pub_key = '-----BEGIN PUBLIC KEY-----\nMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA3FoQOmOl5/CF5hF7ta4E\nzCy2LaU3Eu2k9DBwQ73J82I53Sx9LAgM1DH3IsYohRRx/BESfbdDI2powvr6QYKV\nIC+4Yavwg7gzhZRxWWmT1HruEADCZAgkUCu+9Il/9FPuitPSoIpBd07NqdkkRe82\nNBOfrKTdhge/5zd457fl7J81Q5VTIxO8vvq7FSw7k6Jtv+eOjR6SZOWbbUO7f9r4\nUuUkXmvdGv21qiqtaO1EMw4tUCELzY73M7NpCH3RorlommYX3P6q0VrkDHrCE0/Q\nMhmHsF+46E+IRcJ3wtEj3p/mO1VoCpEhawC1U728ZUTwWNEii8hPEhcNAZTKaQMa\nTQIDAQAB\n-----END PUBLIC KEY-----'
m = b'''https://api.weixin.qq.com/wxa/getuserriskrank
wxba6223c06417af7b
1635927954
{"iv":"fmW/zNxXlytUZBgj","data":"0IDVdrPtSPF/Oe2CTXCV2vVNPbVJdJlP2WaTMQnoYLh5iCrrSNfQFh25EnStDMf0hLlVNBCZQtf9NaV0m4aRA4AAYIO7oR/Ge+4yY4EmZp5EVPB42xjScgMx5X3D4VdLCfynXIUKUtZHZvk1zmLVE3RauzJgiM1BB1CPmwcENo3MTJ0z8Vfkf5tMv54kOXobDLlV5rfqKdAX7gM/rP82DgZdt9vvZX44ipdbHIjJvw83ZXAFtvftdVw2Qd8=","authtag":"5qeM/2vZv+6KtScN94IpMg=="}'''
bsig = 'wcSSWHZunjz9VKl9q+If9deiyECXDAELfAJNZ4+5T+NhFr8zfhkwdQtlgQ7nN5xs99R57La9UjBTRBGge2KYyshWtw7HIMPAqWNsnpHvx0b2f7s6Bt7OpfOQLlIfNgepgTVmUwrqW8/7A12szj7tCe/bRFilwnaX6N0w4duHlfL7ic7IIZXouvy9dLRAa5GtEk1eD/LPWRiKh0SvJ3znPY/pSiQW9zSkXVdj9UGGM8qcKLzPGJ7gSmt3ZOPkFapk9wqFmhJwQj//xN5+hUlr2UiNPMNSHve5Y2ADLsNHqk5t7RfAZ8nW9/8lzhVt4t+toy1FeehxCGIC8qgmjIl1hg=='


pub_key = RSA.import_key(pub_key)
n, e = pub_key.n, pub_key.e


print('n,e:', n, e)




sig = base64.b64decode(bsig)
isig = int.from_bytes(sig, 'big')


rstr = pow(isig, e, n)
bstr = rstr.to_bytes(256, 'big')


if bstr[-1] != 0xbc:
    print('[*]bytes error, not BC')
    print('[*]maybe using wrong pubkey')
    print(bstr.hex())
    exit()
print('bstr:', bstr.hex())


mdb = bstr[:-33]
h2 = bstr[-33:-1]
print('mdb:', mdb.hex())
print('h2:', h2.hex())


lmdb = len(mdb)
mdb += b'\x00' * (0x10-(lmdb & 0xf) & 0xf)
mdbibs = [int.from_bytes(mdb[i:i+32], 'big') for i in range(0, lmdb, 32)]
lmdbibs = len(mdbibs)


db = b''


for i in range(lmdbibs):
    iv = h2+(i).to_bytes(4, 'big')
    tmp_hash = SHA256.new(iv).digest()
    itmp = mdbibs[i] ^ int.from_bytes(tmp_hash, 'big')
    db += itmp.to_bytes(32, 'big')
    # print(iv.hex(), tmp_hash.hex(), mdbibs[i].to_bytes(32, 'big').hex())


# remove padding
db = db[:lmdb]


print('db:', db.hex())


if db[-33] != 0x01:
    print('[*]db bytes error, not 01')
    print('[*]maybe using wrong salt length')
    exit()


salt = db[-32:]
print('salt:', salt.hex())


h = SHA256.new(m).digest()
print('m:', m)
print('h1:', h.hex())


mm = b'\x00'*8+h+salt
ch2 = SHA256.new(mm).digest()
print('mm:', mm.hex())
print('cal h2:', ch2.hex())
print('sig h2:', h2.hex())
if ch2 != h2:
    print('[*]calculated hash error')
    print('[*]using wrong message. check the message hash while signing')
    print('[*]message hash:', h.hex())
    print('[*]message:', m)
    exit()
print('verified')

你好，我不会python，有没有其它办法

找下开源的javasdk 比如wxjava，可能有现成的加解密实现方法